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EarthandSpace 2-3-1
| Question | Answer |
|---|---|
| How can looking at a rock tell you how it was formed? | Properties of a rock such a as texture, color, and mineral composition are a result of how the rock formed |
| Texture | The size, shape, and position of the grains that make up a rock |
| How is a sedimentary rock formed? | When particles of existing rock are transported by water, wind, gravity, or accumulation to form layers of material called sediment on Earths surface |
| How is an igneous rock formed? | A rock partially melts underground - molten rock separates from solid rock and moves upwards - Hot fluid is called "magma" - Minerals grow together from the magma forming an igneous rock |
| How is a metamorphic rock formed? | Rock deep underground heat up from the extreme heat and pressure surrounding the rock causing the atoms in the original rock to rearrange |
| What is Lithification? | Water moving thru pores between grains of sediment deposits chemicals that acts like cement making it a solid |
| Process of rock melting and solidifying | Heating, changes in pressure, and the addition of water can all cause rock to partially melt - cooling and changes in pressure can then cause magma to solidify forming igneous rock underground or on Earths surface |
| Igneous rock that is formed underground is called what? | Intrusive |
| Igneous rock that is on Earths surface is called what? | Extrusive |
| What is metamorphism? | Over time heat and pressure cause rock to rearrange forming crystals, new materials, and textures |
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